21 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Harrisburg | 1 | 9,543 | 10,068 | -0.72% | 262 | 36 | Township |
| Harrisburg | 2 | 7,779 | 8,253 | -1.01% | 1,176 | 7 | City |
| East Eldorado | 3 | 5,122 | 5,414 | -0.76% | 140 | 36 | Township |
| Eldorado | 4 | 3,508 | 3,732 | -1.04% | 1,402 | 3 | City |
| Carrier Mills | 5 | 2,197 | 2,313 | -0.68% | 59 | 37 | Township |
| Carrier Mills | 6 | 1,569 | 1,662 | -0.95% | 1,299 | 1 | Village |
| Independence | 7 | 1,113 | 1,179 | -0.89% | 30 | 37 | Township |
| Raleigh | 8 | 1,055 | 1,107 | -0.57% | 29 | 36 | Township |
| Galatia | 9 | 1,042 | 1,098 | -0.67% | 56 | 19 | Township |
| Brushy | 10 | 936 | 987 | -0.64% | 28 | 34 | Township |
| Galatia | 11 | 770 | 821 | -1.03% | 394 | 2 | Village |
| Stonefort | 12 | 359 | 373 | -0.55% | 20 | 18 | Township |
| Mountain | 13 | 344 | 366 | -0.86% | 8 | 42 | Township |
| Tate | 14 | 274 | 291 | -0.72% | 15 | 18 | Township |
| Raleigh | 15 | 273 | 288 | -0.73% | 138 | 2 | Village |
| Long Branch | 16 | 238 | 249 | -0.42% | 13 | 18 | Township |
| Stonefort | 17 | 217 | 223 | -0.46% | 149 | 1 | Village |
| Cottage | 18 | 216 | 228 | -0.46% | 7 | 31 | Township |
| Eldorado | 19 | 129 | 135 | -1.53% | 4 | 36 | Township |
| Rector | 20 | 63 | 68 | -1.56% | 3 | 18 | Township |
| Muddy | 21 | 56 | 59 | 0% | 185 | 0 | Village |
Harrisburg is the largest city in Saline County, with a population of 9,543.
Muddy is the smallest city in Saline County, with a population of 56.
There are 21 cities in Saline County, Illinois.